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LM5035 数据表(PDF) 6 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
部件名 LM5035
功能描述  PWM Controller with Integrated Half-Bridge and SyncFET Drivers
PDF  28 Pages
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制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

LM5035 数据表(HTML) 6 Page - National Semiconductor (TI)

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Electrical Characteristics Specifications with standard typeface are for T
J = 25˚C, and those with boldface
type apply over full Operating Junction Temperature range.V
VIN = 48V, VVCC = 10V externally applied, RRT = 15.0 k
Ω,
RDLY = 27.4k
Ω,V
UVLO = 3V, VOVP = 0V unless otherwise stated. See (Note 2) and (Note 3). (Continued)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Soft-Start (SS Pin)
I
SS
Charging current in normal
operation
V
SS =0
40
55
70
µA
Charging current during a hiccup
mode restart
V
SS =0
0.6
1.2
1.8
µA
Soft-stop Current Sink
V
SS = 2.5V
40
55
70
µA
Oscillator (RT Pin)
F
SW1
Frequency 1 (at HO, half oscillator
frequency)
R
RT =15k
Ω,T
J = 25˚C
185
200
215
kHz
R
RT =15k
Ω,T
J = -40˚C to 125˚C
180
220
F
SW2
Frequency 2 (at HO, half oscillator
frequency)
R
RT = 5.49 k
Ω
430
500
570
kHz
DC level
2V
Input Sync threshold
2.5
3
3.4
V
PWM Controller (Comp Pin)
Delay to output
80
ns
V
PWM-OS
SS to RAMP offset
0.7
1
1.2
V
Minimum duty cycle
SS = 0V
0
%
Small signal impedance
I
COMP = 600µA, COMP current to PWM
voltage
5000
Ω
Main Output Drivers (HO and LO Pins)
Output high voltage
I
OUT = 50mA, VHB -VHO,VVCC -VLO
0.5
0.25
V
Output low voltage
I
OUT = 100 mA
0.2
0.5
V
Rise time
C
LOAD =1nF
15
ns
Fall time
C
LOAD =1nF
13
ns
Deadtime, HO to LO, LO to HO
V
DLY =VREF,ICOMP = 0mA
45
70
100
ns
Peak source current
V
HO,LO = 0V, VVCC = 10V
1.25
A
Peak sink current
V
HO,LO = 10V, VVCC = 10V
2
A
Voltage Feed-Forward (RAMP Pin)
RAMP comparator threshold
COMP current = 0
2.4
2.5
2.6
V
Synchronous Rectifier Drivers (SR1, SR2)
Output high voltage
I
OUT = 10mA, VVCC -VSR1,VVCC -VSR2
0.25
0.1
V
Output low voltage
I
OUT = 20 mA (sink)
0.08
0.2
V
Rise time
C
LOAD =1nF
40
ns
Fall time
C
LOAD =1nF
20
ns
Peak source current
V
SR =0,VVCC = 10V
0.5
A
Peak sink current
V
SR =VVCC,VVCC = 10V
0.5
A
T1
Deadtime, SR1 falling to HO rising,
SR2 falling to LO rising
R
DLY = 10k
40
ns
R
DLY = 27.4k
75
100
125
ns
R
DLY = 100k
300
ns
T2
Deadtime, HO falling to SR1 rising,
LO falling to SR2 rising
R
DLY = 10k
20
ns
R
DLY = 27.4k
30
45
65
ns
R
DLY = 100k
140
ns
www.national.com
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